Hi,

Your environment is python 2.7 when it should be python 3.
See:
>   File "/usr/local/lib/python2.7/dist-packages/_pytest/assertion/
> rewrite.py", line 213, in load_module

Are you using virtualenv to create a python 3 environment to use with the tests?

>From README.md:

**Note**: While virtualenv isn't strictly required, using virtualenv is almost 
always the quickest
path to success as it provides common base setup across various configurations.

1. Install virtualenv: ``pip install virtualenv``
2. Create a new virtualenv: ``virtualenv --python=python3 --no-site-packages 
~/dtest``
3. Switch/Activate the new virtualenv: ``source ~/dtest/bin/activate``
4. Install remaining DTest Python dependencies: ``pip install -r 
/path/to/cassandra-dtest/requirements.txt``

Regards,
Ariel

On Mon, Mar 26, 2018, at 11:13 AM, Tyagi, Preetika wrote:
> I was able to run requirements.txt with success. Below is the error I get:
> 
> Traceback (most recent call last):
>   File "/usr/local/lib/python2.7/dist-packages/_pytest/config.py", line 
> 371, in _importconftest
>     mod = conftestpath.pyimport()
>   File "/usr/local/lib/python2.7/dist-packages/py/_path/local.py", line 
> 668, in pyimport
>     __import__(modname)
>   File "/usr/local/lib/python2.7/dist-packages/_pytest/assertion/
> rewrite.py", line 213, in load_module
>     py.builtin.exec_(co, mod.__dict__)
>   File "/usr/local/lib/python2.7/dist-packages/py/_builtin.py", line 
> 221, in exec_
>     exec2(obj, globals, locals)
>   File "<string>", line 7, in exec2
>   File "/home/<path to conftest.py>/conftest.py", line 11, in <module>
>     from itertools import zip_longest
> ImportError: cannot import name zip_longest
> ERROR: could not load /home/<path to conftest.py>/conftest.py
> 
> Thanks,
> Preetika
> 
> -----Original Message-----
> From: Murukesh Mohanan [mailto:murukesh.moha...@gmail.com] 
> Sent: Sunday, March 25, 2018 10:48 PM
> To: dev@cassandra.apache.org
> Subject: Re: question on running cassandra-dtests
> 
> The complete error is needed. I get something similar if I hadn't run 
> `pip3 install -r requirements.txt`:
> 
> Traceback (most recent call last):
>   File "/usr/local/lib/python3.6/site-packages/_pytest/config.py", line 
> 328, in _getconftestmodules
>     return self._path2confmods[path]
> KeyError: local('/home/muru/dev/cassandra-dtest')
> 
> During handling of the above exception, another exception occurred:
> Traceback (most recent call last):
>   File "/usr/local/lib/python3.6/site-packages/_pytest/config.py", line 
> 359, in _importconftest
>     return self._conftestpath2mod[conftestpath]
> KeyError: local('/home/muru/dev/cassandra-dtest/conftest.py')
> 
> During handling of the above exception, another exception occurred:
> Traceback (most recent call last):
>   File "/usr/local/lib/python3.6/site-packages/_pytest/config.py", line 
> 365, in _importconftest
>     mod = conftestpath.pyimport()
>   File "/usr/local/lib/python3.6/site-packages/py/_path/local.py", line 
> 668, in pyimport
>     __import__(modname)
>   File "/usr/local/lib/python3.6/site-packages/_pytest/assertion/
> rewrite.py", line 212, in load_module
>     py.builtin.exec_(co, mod.__dict__)
>   File "/home/muru/dev/cassandra-dtest/conftest.py", line 13, in 
> <module>
>     from dtest import running_in_docker, 
> cleanup_docker_environment_before_test_execution
>   File "/home/muru/dev/cassandra-dtest/dtest.py", line 12, in <module>
>     import cassandra
> ModuleNotFoundError: No module named 'cassandra'
> ERROR: could not load /home/muru/dev/cassandra-dtest/conftest.py
> 
> Of course, `pip3 install -r requirements.txt` creates an `src` directory 
> with appropriate branches of ccm and cassandra-driver checked out.
> 
> If you have run `pip3 install -r requirements.txt`, then something else 
> is wrong and we need the complete error log.
> 
> On 2018/03/23 20:22:47, "Tyagi, Preetika" <preetika.ty...@intel.com> wrote: 
> > Hi All,
> > 
> > I am trying to setup and run Cassandra-dtests so that I can write some 
> > tests for a JIRA ticket I have been working on.
> > This is the repo I am using: https://github.com/apache/cassandra-dtest
> > I followed all the instructions and installed dependencies.
> > 
> > However, when I run "pytest -cassandra-dir=<path to Cassandra source root 
> > directory>
> > 
> > It throws the error "could not load <some path>/conftest.py.
> > 
> > I checked that this file (conftest.py) exists in Cassandra-dtest source 
> > root and I'm not sure why it cannot find it. Does anyone have any idea what 
> > might be going wrong here?
> > 
> > I haven't used dtests before so I wonder if I'm missing something here.
> > 
> > Thanks,
> > Preetika
> > 
> > 
> 
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